A na-ekewakwa viscosity nke sodium carboxymethyl cellulose n'ọtụtụ akara ule dị ka ojiji dị iche iche si dị.The viscosity nke ịsa ụdị bụ 10 ~ 70 (n'okpuru 100), elu ịgba nke viscosity si 200 ~ 1200 maka ụlọ mma na ndị ọzọ ọrụ, na viscosity nke nri ọkwa bụ ọbụna elu.Ha niile karịrị 1000, na viscosity nke ụlọ ọrụ dị iche iche abụghị otu.
N'ihi na ọtụtụ ihe eji eme ya.
The viscosity nke sodium carboxymethyl cellulose na-emetụta ya ikwu molekul uka, itinye uche, okpomọkụ na pH uru, na ọ na-agwakọta ya na ethyl ma ọ bụ carboxypropyl cellulose, gelatin, xanthan gum, carrageenan, igurube bean gum, guar gum, agar, sodium alginate. pectin, chịngọm arabic na starch na mmepụta ya nwere ezigbo ndakọrịta (ie synergistic mmetụta).
Mgbe pH uru bụ 7, viscosity nke sodium carboxymethyl cellulose ngwọta bụ kasị elu, na mgbe pH uru bụ 4 ~ 11, ọ bụ dịtụ kwụsiri ike.Carboxymethylcellulose n'ụdị alkali metal na ammonium salts bụ soluble na mmiri.Divalent metal ion Ca2+, Mg2+, Fe2+ nwere ike imetụta viscosity ya.Ọla dị arọ dị ka ọlaọcha, barium, chromium ma ọ bụ Fe3+ nwere ike ime ka ọ pụta ìhè na ngwọta.Ọ bụrụ na a na-achịkwa ntinye nke ion, dị ka mgbakwunye nke onye na-ahụ maka chelating citric acid, enwere ike ịmepụta ihe ngwọta viscous karị, na-eme ka chịngọm dị nro ma ọ bụ siri ike.
Sodium carboxymethyl cellulose bụ ụdị eke cellulose, nke a na-emekarị nke owu linter ma ọ bụ osisi pulp dị ka akụrụngwa na doro na etherification mmeghachi omume na monochloroacetic acid n'okpuru alkaline ọnọdụ.
Dị ka nkọwapụta nke akụrụngwa na nnọchi nke hydroxyl hydrogen na cellulose D-glucose unit site carboxymethyl otu, mmiri-soluble polymer ogige na dị iche iche ogo nke nnọchi na dị iche iche molekụla nkesa arọ na-enweta.
N'ihi na sodium carboxymethyl cellulose nwere ọtụtụ pụrụ iche na magburu onwe e ji mara, ọ na-ọtụtụ ebe na-eji kwa ụbọchị chemical ụlọ ọrụ, nri na ọgwụ na ndị ọzọ ulo oru mmepụta.
Otu n'ime ihe kacha mkpa egosi sodium carboxymethyl cellulose bụ viscosity nke sodium carboxymethyl cellulose.Uru nke viscosity metụtara ihe dị iche iche dị ka itinye uche, okpomọkụ na ọnụ ọgụgụ shear.Otú ọ dị, ihe ndị dị ka ntinye uche, ọnọdụ okpomọkụ na ọnụ ọgụgụ isi bụ ihe ndị dị n'èzí na-emetụta viscosity nke sodium carboxymethyl cellulose.
Ibu arọ ya na nkesa molekụla bụ ihe dị n'ime na-emetụta viscosity nke sodium carboxymethyl cellulose ngwọta.Maka njikwa mmepụta na mmepe mmepụta nke sodium carboxymethyl cellulose, nyocha nke ịdị arọ ya na nkesa molekụla nwere uru ntụaka dị oke mkpa, ebe viscosity nha nwere ike rụọ ọrụ ụfọdụ.
Iwu Newton na rheology, biko gụọ ọdịnaya dị mkpa nke "rheology" na kemistri anụ ahụ, ọ na-esiri ike ịkọwa n'otu ahịrịokwu ma ọ bụ abụọ.Ọ bụrụ na ị ga-ekwu ya: maka ihe ngwọta nke cmc dị nso na mmiri mmiri Newtonian, nrụgide nke shear na-adaba na ọnụ ọgụgụ nke mbepụ ọnụ, na ọnụ ọgụgụ dị n'etiti ha ka a na-akpọ viscosity coefficient ma ọ bụ kinematic viscosity.
A na-enweta viscosity site na ike dị n'etiti agbụ molekul cellulose, gụnyere ike mgbasa na hydrogen bond.Karịsịa, polymerization nke ihe ndị na-emepụta cellulose abụghị usoro ahịrị ahịrị kama ọ bụ nhazi nke ọtụtụ alaka.Na ngwọta, ọtụtụ cellulose nwere ọtụtụ alaka na-ejikọta ọnụ iji mepụta nhazi netwọk oghere.Ka usoro ahụ siri sie ike, ka ike dị n'etiti agbụ molekụla na-esi na ya pụta.
Iji mee ka mmiri na-asọba na ngwọta dilute nke ihe ndị na-emepụta cellulose, a ghaghị imeri ike dị n'etiti ụdọ molekụla, ya mere, ngwọta nke nwere nnukwu polymerization chọrọ ike dị ukwuu iji mee ka mmiri na-asọpụta.Maka nha viscosity, ike dị na ngwọta CMC bụ ike ndọda.N'okpuru ọnọdụ nke ike ndọda na-adịgide adịgide, usoro nhazi nke ngwọta CMC na nnukwu ogo polymerization nwere nnukwu ike, na-agba ọsọ na-adị nwayọọ.Ngwunye nwayọ na-egosipụta viscosity.
Viscosity nke sodium carboxymethyl cellulose na-emetụtakarị na ịdị arọ molekụla, ma ọ nweghị ihe jikọrọ ya na ogo nnọchi.Ka ogo nke nnọchi anya ka ukwuu, ka ịdị arọ molekụla na-abawanye, n'ihi na ịdị arọ molekụla nke otu carboxymethyl dochie anya karịrị otu hydroxyl gara aga.
Nnu sodium nke cellulose carboxymethyl ether, anionic cellulose ether, bụ ọcha ma ọ bụ milky ọcha fibrous ntụ ntụ ma ọ bụ granule, nke nwere njupụta nke 0.5-0.7 g / cm3, ọ fọrọ nke nta ka ọ ghara isi ísì, enweghị ụtọ, na hygroscopic.Ọ dị mfe ịgbasa n'ime mmiri iji mepụta ngwọta colloidal transperent, ọ na-esikwaghị ike na ihe mgbaze organic dị ka ethanol.pH nke 1% ngwọta mmiri bụ 6.5 ruo 8.5.Mgbe pH>10 ma ọ bụ <5, viscosity nke sodium carboxymethylcellulose na-ebelata nke ukwuu, na arụmọrụ kacha mma mgbe pH = 7.
Ọ na-ekpo ọkụ ọkụ.Viscosity na-ebili ngwa ngwa n'okpuru 20 ℃, ma na-agbanwe nwayọọ nwayọọ na 45 ℃.Ogologo oge kpo oku n'elu 80 ℃ nwere ike denature na colloid na ibelata viscosity na arụmọrụ budata.Ọ na-adị mfe sorrel na mmiri, na ngwọta bụ uzo;ọ kwụsiri ike na ngwọta alkaline, ọ dịkwa mfe iji hydrolyzed n'ihu acid.Mgbe uru pH dị 2-3, ọ ga-ebuli elu.
Oge nzipu: Nov-07-2022